Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6baae35a83eca8…

MALICIOUS

PDF

48.1 KB Created: 2021-06-09 14:30:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d97cf63b5964f22a0af341d62aeed0dd SHA-1: 6843860417a94a5cc7624801e6deba54b2b6a93d SHA-256: ab6baae35a83eca8932fedc384937769bb6324a87bbe5b66f2627728305a5b6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks and free currency. The primary URL identified, https://netcdn.tw/app/431946152/free-roblox-card-codes-2021-game-hack, is flagged as malicious. The document body, though partially garbled, contains text related to 'Free Roblox Card Codes' and the malicious URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/free-roblox-card-codes-2021-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/carding-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pokemon-go-free-games_GM1094591345.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005179.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5179 31096 bytes
SHA-256: 69a003562e500b333d1b4f1fb27045b6a6c8219ca90d0ae8ddb3e19b7ceb2830
font_01_sfnt_off00009845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9845 18752 bytes
SHA-256: 6cb2339426737bb64ab88edd3767f946b4c58fc4edcdb2b654d327f796c0e3ca

Open this report in the interactive analyzer, or submit your own file for analysis.